Adjustable wrench.



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A' rarnnr onnron ANDERS FEDER JENSEN', OF NORRKPING, SWEDEN, ASSIGNOR TO B. 8c O. LYIBERGS FABRIKSAKTIEBOLAG, OF` ROSENFORS, SKOGSTORP, SWEDEN.

ADJUSTABLE WRENCH.

To all whom t may concern:

Be it known that I, ANDERS FEDER JENsEN, a subject of the King of Denmark, residing at-Norrkping, in the Kingdom of Sweden, have invented a new and useful Improvement in Adjustable Wrenches, of which the following is a specification.

This invention refers to an adjustable wrench of the kind in which the movable jaw of the wrench is actuated by means of an eccentric device pivoted to the movable jaw and coperating with lugs on the shank of the rigid jaw.

The object of the invention is to provide an adjustable wrench of the said kind in which there is no lost motion and which may be rapidly and easily adjusted by a single manipulation and be securely tightened around nuts of very different sizes, besides which the wrench needs not be removed from the nut in order to be turned around the same, but when turned back the wrench automatically releases the nut and when turned forward it again automatically grips the nut. The present wrench is also arranged in such manner that it may lbe taken apart and assembled without having to detach or to secure any connecting part, that is to say that the taking apart and the assembling are simply effected by separating the parts from one another, or by arranging the parts in each other.

The invention is chiefly characterized by this that the eccentric is arranged on a handle pivoted to the movable jaw in such manner that the handle is movable in the plane of the shank and the jaws, so that the force to be exerted for turning the handle and closing the jaws will lie in the 'same plane as the force exerted for turning the wrench. The pivot pin of the handle in the movable jaw may suitably be on the same side of the shank of the rigid jaw as the working surface of the movable jaw, while the handle extends to the other side of the shank, by which it is attained that the force exerted on the movable jaw, becomes directed as nearly as possible at right angles to the working surfaces of the jaws and through the axis of the nut engaged by the jaws.

The accompanying drawing illustrates an embodiment of the present wrench, viewed from the side and partly in section in Figure l, and edgewise in Fig. 2.

l is the rigid jaw of the wrench, which Specification of Letters Patent.

Application filed May 18, 1917.

Patented July 2d, 1191"?.

Serial No. 169,459.

is preferably made in one piece with the shank 2. The movable jaw 3 may slide along theV shank 2 and may be connected with the .shank by means of a sleeve 5 embracing the shank and secured to the jaw 3 by means of rivets fl. A handle 6 is rotatably connected with the movable jaw 3, which handle embraces the shank with two parallel lateral projections 7 which extend over the shank 2 and are connected on the side of the shank opposite the handle 6 by means of a pin 8 loosely introduced in a slot 9 in the movable jaw 3. The handle 6 is thus rotatably connected with the movable jaw 3 and at the same time securely held in its appointed position.

On both sides of the shank 2 there is a number of parallel notches l0 arranged above each otherin the longitudinal direction of the shank, and each of the lateral projections 7 on the rotatable handle 6 is provided with an edge ll eccentric in relation to the axis 8 of rotation of the handle. As will be seen from Fig. 2, the edges l1 of the projections 7 are bent inward against the shank 2 so that they will securely engage the notches 10.

The described adjustable wrench is used in the following manner: When the jaws l, 3 are to be adjusted for instance for a nut l2, the handle 6 is turned outward from the shank 2, until the eccentric edges ll leave, that is to say, become free from the notches l0. Only in this position of the handle 6 can the same and the movable jaw 3 be freely moved along the shank 2, such free movement being impossible while the said edges 1l engage the notches l0 (see Fig. 2). rlhe jaw 3 is then moved to a position which about corresponds to the size of the nut, and the wrench having been placed on the nut, the handle 6 is forced toward the shank 2. The eccentric edges 1l then enter the two nearest notches l0 and force the movable jaw against the nut, which is thus seized between the jaws. When a nut is to be drawn very tight, the force exerted on the handle 6 becomes correspondingly greater, and thus also the grip around the nut more powerful in a corresponding degree.

lt will be understood from Fig. 1 that the notches 10 and the eccentric edges 1l of the handle 6 are so arranged with relation to the axis 8 of rotation that the movable jaw 3 may be moved within certain limits Y along` `the shank by turning the handle `,also

* While the eccentric edges are in engagement with the notches; @n -account'hereofg When the Wrench is to be moved from one pair of' yopposing surfaces of the nut to the next pair of surfaces, the Wrench may simply be turned aroundlthe nut inthe desired direef tion While releasing the hold on the handley 6, after which the handle is againz Jforced against the shank 2.

Itisobvious that each .pair ofnotches 10 n Vmay', correspond to severaldifferent sizesofy nuts-dependent on the position'o-the handlef6, or of its eccentric edges l1 withlrelaf tionzto the notches 10, and 'that .a compara# tively shortwrench maybe used for comparatively very varying sizes of 'the nuts, and

also that the W-renchrnay be provided withk a` great numberl ofnotches.. Itis alsoobviousthat thereis noflost motion Worth mentioning invthis adjustable,Wrench.y n v Asstated above, this adjustablevvrench may very easily beftaken apartI and reassem bled Without any connecting parts having f to be detachedorf secured. For this purpose the handle 6 is only turned. out from-the shank so that kthe eccentric'edgesllleave the notches lO. The shank 2 XWiththefrigid v j avv` 1v: mayA then bevdirectly. pulled out from ythesleeve 5 of the movable jaw 3, after which the h-andle.- 6 is separated from the 3:. The assembling ismade inthe'reversed order;

The: details of the, described:embodiment` mayV` be. modified; `Without departing.;` from the principle of the;k invention. The handle 6 may thus, for instance, bep-rovded with Copies ofv this patent may bert obtained for .only one lateralproje'ction i and one 'eceenEn trio edge 11, and thus also the shank 2 with` notches-orprojeetionseonlyonLone side. The Wrench may also advantageously be arranged as a pipe Wrench.

Ielan: l 1l In an adjustable Wrench, the combina-y tionr ofa shank, a rigid jaw onthe shank,

andthej avvs, a handle Y.pivoted on said pin and amena-ble in the. vplane of the i shank and the jaws zand;extendingykto-)the side of' the 'shanlvQo-ppositeithat' ot"I the j aWs, .and an eenentricA device-on fsaid handlek adapted Ato cooperate lwith :the lugs on the shank land means permitting;saidfeccentrio device 4to -be disengaged roni saidiflngs When"k the handle is turned at about right angles. to the shank. 2'; An.' adjustable Wrench, comprising a shank,` lugs and a-Krigidjavv onsaidshank, n

azjaw slidaltlymounted onsaid-shank and provided-with apivot p in, ahandle pivoted togsaid pin Aand :provided V,vvith langes adaptedftowembrace saldshank-When said handle trie: devices struc-k up from said Lilangesand adapted lto engage said llugs to bind said Jaws abontthe 'object to be clamped, and means ype:rintting saideceentric devices to be disis adjusted'toraiser-said slidable jaw, ecceng engaged from, said lugs when l vksaid handle. n is turned at aboutright angles to said shank.

ANDERS. FEDER JENSEN.

ve cents-=eaehby addressingthe Commissioner of Eatents, y Washingtony-DVGJ. y f 

